2 files changed, 11 insertions, 1 deletions

diff --git a/sys/dev/acpica/Osd/OsdTable.c b/sys/dev/acpica/Osd/OsdTable.c
index a70e73e6b841f..58c01cd8e5415 100644
--- a/sys/dev/acpica/Osd/OsdTable.c
+++ b/sys/dev/acpica/Osd/OsdTable.c
@@ -45,13 +45,18 @@ AcpiOsTableOverride (
 {
     caddr_t                 acpi_dsdt, p;
 
-    if (NewTable == NULL)
+    if (ExistingTable == NULL || NewTable == NULL)
     {
         return(AE_BAD_PARAMETER);
     }
 
     (*NewTable) = NULL;
 
+    if (strncmp(ExistingTable->Signature, "DSDT", 4) != 0)
+    {
+        return(AE_OK);
+    }
+
     if ((acpi_dsdt = preload_search_by_type("acpi_dsdt")) == NULL)
     {
         return(AE_OK);
diff --git a/sys/dev/acpica/acpi.c b/sys/dev/acpica/acpi.c
index b292bcc6422e0..9ccaf2dbfe736 100644
--- a/sys/dev/acpica/acpi.c
+++ b/sys/dev/acpica/acpi.c
@@ -387,6 +387,11 @@ acpi_attach(device_t dev)
 	goto out;
     }
 
+    if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) {
+	device_printf(dev, "could not initialize ACPI objects: %s\n", AcpiFormatException(status));
+	goto out;
+    }
+
     /*
      * Setup our sysctl tree.
      *